期刊
FOOD CHEMISTRY
卷 361, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.130108
关键词
ROS; Multi-frequencies; FT-IR; A; acidoterrestris; Spectral characterization
资金
- National Key Research and Development Program of China [2017YFD040090301, 2016YFD040070504]
- Science and Technology Major Project of Anhui [18030701152]
- National Natural Science Foundation of China [31801561]
The study showed that the use of multifrequency ultrasound technology can effectively inactivate AAT vegetative cells and spores in orange juice without negatively impacting its quality. Additionally, the production of ROS was found to have an inverse relationship with AAT inactivation.
This is the first time to investigate the synergistic inactivation effect and mechanism of multifrequency ultrasound (MTUS) on A. acidoterrestris (AAT) vegetative cells and spores, nutrients and enzymes of orange juice. The optimized results of MTUS (using Box Behnken design- surface response methodology) and further comparison with different mode of ultrasound (mono-and multi-frequency) revealed that 20/40 kHz, 24 min and 64 degrees C were the best optimum results. The AAT spores and vegetative cells were inactivated by 2 and 4 logs, respectively, without deteriorating orange juice contents. In addition, AAT inactivation indicated an inversely proportional relationship with ROS production. FT-IR and UV-Vis spectroscopy characterization confirmed the existence of ROS in treated orange juice and LF-NMR analysis confirmed the inactivation of AAT spores. The findings illustrated the successfully used dual-frequency ultrasound technology for fruit beverages, promoting beneficial changes in physical properties without any significant effects on the quality of ascorbic acid.
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